Conair WSB - Manual (Page 53)

ROC parameter (ROC 10000), will cause a portion of the Regrind to be
SUBTRACTED from the Natural portion, instead of added.
EXAMPLE: ROC set to (ROC 10020).
The 20 means take 20 % of the REGRIND dispense and ADJUST the NATURAL
dispense by this amount. The 1 means adjust by SUBTRACTION.
Whatever amount of REGRIND is added, 20 percent of this amount will be
subtracted from the Natural amount before a color calculation is made.
If Regrind dispense = 600 grams, and
Natural portion = 1400 grams,
Color, at 4 percent, would be 56 grams if ROC=00000.
If ROC=10020; reduce Natural by 20 % of 600, (120 grams).
So color is calculated to be 4 % of 1280 grams (1400-120), which
equals 51 grams.
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ROV
ROV is a parameter that will allow your unit to AUTOMATICALLY
change to a higher REGRIND USAGE in the event that the amount of
regrind being produced exceeds the usage rate.
NO LEVEL SENSORS are required for this parameter to work.
The first two digits of the parameter number represent a CYCLE COUNT,
the last three digits represent a PERCENT. When EITHER number equals
zero, the parameter has no effect.
If your system dispenses the full requested amount of regrind for the
number of consecutive cycles specified by the CYCLE count, it
automatically jumps to the PERCENTAGE indicated by the last 3 digits.
This parameter is useful if your process is one where a runner is
molded, ground up, and loaded back into the regrind hopper immediately
and continuously every cycle.
For example: Say your runner represents 20 percent of your shot
weight. You set your controller to 25 percent regrind. Under normal
conditions your system adds back the 20 percent of scrap that is
produced each cycle, only occasionally dispensing up to the maximum 25
percent that the setting calls for. Since supply is limited to 20
percent, you never dispense a full 25 percent more then once or twice
in a row.
Now say you start producing all bad parts and the entire shot is being
feed into the grinder as scrap. Dispenses will now be a full 25
percent every cycle. The regrind hopper will also begin to fill.
With this parameter set to (ROV 10100) (10 cycles and 100 percent),
after 10 cycles have occurred at the full 25 percent, the unit will
automatically start using regrind at 100 percent
This prevents your hopper from becoming full. This is critical in
fully automated systems that are evacuating the chamber of a grinder
continuously and rely on space in the regrind hopper to keep the
grinder discharge clear.
As soon as one cycle occurs that does not dispense the new full amount,
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